<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>052-innerHTML.html</title>
</head>
<body>
	<div id="box">
		<p>段落</p>
	</div>
</body>
<script>
	var oBox = document.getElementById('box');
	oBox.innerHTML = "<span>内容</span>";
</script>
</html>
